User Manual

RevA LC900008 5of14
SAFETYPRECAUTIONS(cont.) StepThree
Make a Fail‐Safe System:  Design a fail‐safe system that accommodates the possibility of relay or power
failure.If power is cut off to the controller, it will de‐energize the relay.Make sure that the de‐energized
stateoftherelayisthesafestateinyourprocess.Forexample,ifcontrollerpowerislost,apumpfillingatank
willturnoffifitisconnectedtotheNormallyOpensideoftherelay.
While the internal relay is reliable, over the course of time relay failure is possible in two modes: under a
heavyloadthecontactsmaybe“welded”orstuckintotheenergizedposition,orcorrosionmaybuildupona
contact so that it will not complete the circuit when it should.In critical applications, redundant backup
systems and alarms must be used in addition to the primary system.Such backup systems should use
differentsensortechnologieswherepossible.
WhilethismanualofferssomeexamplesandsuggestionstohelpexplaintheoperationofFLOWLINEproducts,
such examples are for information only and are not intended as a complete guide to installing any  specific
system.
Sensor‐mount controllers:The LC30 Series is a cost‐effective, modular flow controller, whose body
incorporatesafemale3/4"NPT(3/4"R)fitting,allowingittobemounteddirectlyontoanyFlowlinesensoror
any3/4"connection.SimplyprovideitsrequiredACpowerandacontrolleddevicesuchasavalve,pump,or
alarmthatcanbeswitchedbythecontroller’srelayinresponsetothesensorinput.
FeaturesoftheLC30SingleInputController:TheLC30Controllerisdesignedtoreceiveasignalfromasingle
flowswitch.ItturnsitsinternalrelayOnorOff(assetbytheinvertswitch)inresponsetothepresenceofflow
orno‐flow,andchangestherelaystatusbackagainwhenthesensorreverses.TheLC30maybeusedwithany
FLOWLINEN‐channelorrelayflowswitch.Therelayisasinglepole,doublethrowtype;thecontrolleddevice
canbeconnectedtoeitherthenormallyopenornormallyclosedsideoftherelay.Atimedelayfrom0to60
secondscanbesetbeforetherelayrespondstothesensorinput.
TypicalapplicationsfortheLC30arefloworno‐flowswitch/alarmoperations(activatinganalarmatno‐flow).
Components:
PartNumber Thread Power CE CSA Strobe
Alert™
LC30‐1001
¾”NPT
120
No Yes
No
LC30‐1001‐CE Yes No
LC30‐1001‐E
240
No Yes
LC30‐1001‐E‐CE Yes No
LC30‐1051
¾”Rc
120
No Yes
LC30‐1051‐CE Yes No
LC30‐1051‐E
240
No Yes
LC30‐1051‐E‐CE Yes No
LC30‐1002
¾”NPT
120
No No Yes
LC30‐1002‐E 240
LC30‐1052
¾”Rc
120
LC30‐1052‐E 240
 Owner’sManual
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